package com.cy.chatTest.common;

import com.cy.chatTest.db.UserInfo;
import com.cy.chatTest.db.UserInfoRepository;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;

public class CommonUtil {

    public static String getCookie(HttpServletRequest httpServletRequest,String key){
        try {
            Cookie[] cookies = httpServletRequest.getCookies();
            for (Cookie cookie:cookies) {
                if (key.equals(cookie.getName())){
                    return cookie.getValue();
                }
            }
            return null;
        }catch (Exception e){

        }
        return null;
    }

    public static UserInfo getUserInfo(HttpServletRequest httpServletRequest,UserInfoRepository userInfoRepository){
        try {
            Cookie[] cookies = httpServletRequest.getCookies();
            for (Cookie cookie:cookies) {
                if ("ChatApp".equals(cookie.getName())){
                    return userInfoRepository.findByCookie(cookie.getValue());
                }
            }
            return null;
        }catch (Exception e){

        }
        return null;
    }

    public static String getIPAddress(HttpServletRequest request) {
        String ip = null;

        //X-Forwarded-For：Squid 服务代理
        String ipAddresses = request.getHeader("X-Forwarded-For");

        if (ipAddresses == null || ipAddresses.length() == 0 || "unknown".equalsIgnoreCase(ipAddresses)) {
            //Proxy-Client-IP：apache 服务代理
            ipAddresses = request.getHeader("Proxy-Client-IP");
        }

        if (ipAddresses == null || ipAddresses.length() == 0 || "unknown".equalsIgnoreCase(ipAddresses)) {
            //WL-Proxy-Client-IP：weblogic 服务代理
            ipAddresses = request.getHeader("WL-Proxy-Client-IP");
        }

        if (ipAddresses == null || ipAddresses.length() == 0 || "unknown".equalsIgnoreCase(ipAddresses)) {
            //HTTP_CLIENT_IP：有些代理服务器
            ipAddresses = request.getHeader("HTTP_CLIENT_IP");
        }

        if (ipAddresses == null || ipAddresses.length() == 0 || "unknown".equalsIgnoreCase(ipAddresses)) {
            //X-Real-IP：nginx服务代理
            ipAddresses = request.getHeader("X-Real-IP");
        }

        //有些网络通过多层代理，那么获取到的ip就会有多个，一般都是通过逗号（,）分割开来，并且第一个ip为客户端的真实IP
        if (ipAddresses != null && ipAddresses.length() != 0) {
            ip = ipAddresses.split(",")[0];
        }

        //还是不能获取到，最后再通过request.getRemoteAddr();获取
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ipAddresses)) {
            ip = request.getRemoteAddr();
        }
        return ip;
    }
}
